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This sub's name gets straight to the point — the Focal K2 Power subwoofer delivers hard-hitting low end that combines realistic reproduction with competition-level sound pressure. Precision engineering and hand-assembled construction make this sub a sound choice for a high-performance bass system.

Powerful magnet
A massive multi-element magnet provides the backbone for the sub's powerful reputation — its circular array provides a uniform field across the entire width of the sub, driving the motor assembly with unerring precision. Focal anchors the K2 Power sub with a rugged zamak zinc alloy basket for dependable performance that won't get bent out of shape by your music.

3-layer cone
At the top end of the sub, a butyl rubber surround maintains control of the cone, even during deep excursion. Focal's unique composite sandwich cone employs a structural foam central core coated with a layer of Aramid fiber on the front and a glass layer on the back side. The three layers together form an incredibly rigid yet lightweight membrane for high-quality sound reproduction with the added emphasis of thunderous sound pressure.

Assembled and inspected by hand
You can feed the K2 Power 33 KX 13" subwoofer up to 400 watts RMS without fear. This sub produces bass that's highly accurate and plenty forceful, and its dual voice coils provide multiple wiring options for your system. Focal assembles each sub by hand and rigorously inspects them for any flaws to ensure your investment performs to the high sound standards they've set.

Note: If you are wiring this DVC sub for lower impedance, make sure that your amp is compatible. Most 2-channel car amplifiers are stable down to 2 ohms in standard mode, or 4 ohms in bridged operation. Most mono amps are stable down to 2 ohms.

To drive this single subwoofer, we recommend a mono amplifier rated between 300 and 600 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Product Research

Features

K2 Composite Sandwich Membrane/Cone: The FOCAL K2 Power 33KX
features a composite sandwich membrane/cone comprising of Kevlar, foam, and a
Kevlar material structure that is rigid, yet light weight, and allows fast bass
response without distortion. This cone structure features a thermoformed,
structural foam central core, coated with an Aramid fiber layer on the front
side and a glass layer on the back side. This hybrid technology significantly
improves membrane rigidity without raising the weight and allows long coil,
distortion free bass even at high levels. This composite sandwich membrane/cone
design offers an extremely rigid structure, improves power handling (400 watts
RMS/800 watts Peak), and has low distortion characteristics.

NBR Surround: The FOCAL K2 Power 33KX features a
long-throw NBR
(Nitrile Butyl Rubber) surround for long excursion, deep bass (30-1000Hz), and added
durability to promote long life.

Copper Voice Coil: The FOCAL K2 Power 33KX features an edge-wound
copper, 4 layer/2.6", dual 2-ohm voice coil on a Kapton former (aluminum) for high
power handling, bass without distortion and impedance flexibility to allow an optimized connection with the amplifier.

Dual 2-ohm Voice Coils: This woofer features dual 2-ohm
voice coils that offer flexibility in wiring. When the voice coils are wired in
parallel with each other, the woofer presents a 1-ohm mono load. When the voice
coils are wired in series with each other, the woofer presents an 4-ohm mono
load. In addition, each coil may be connected to a different amplifier channel
and each channel will see a 2-ohm load.

High-Performance Spider: The K2 Power 33KX features a high-performance
spider with integrated braids to form one complete layer. This spider
configuration eliminates wire fatigue, as well as wear-and-tear on the wire.

Multi-Ferrite Magnets: The K2 Power 33KX woofer
utilizes six triple-stacked Ferrite magnets (18 total) to create a powerful
magnetic field to help suppress compression and give better power handling. This
Multi-Ferrite motor assembly allows for greater efficiency (90db), higher power
handling capabilities, and natural cooling of the woofer's voice coil.

Die Cast (Zamak) Vented Basket: The FOCAL
K2 Power 33KX features a vented die-cast Zamak basket which is a rigid, non-magnetic,
and non-resonant frame that provides a strong, reliable structure for the
woofer. The vented basket provides a self-regulated coil cooling
system which allows air to flow freely preventing heat build-up and optimized
reliability and performance consistency.

Spring-Posts: The FOCAL 13" woofer is equipped with a pair of
nickel-plated spring-post speaker terminals for easy connection up to 10AWG wire.

Foam Gasket: The K2 Power 33KX comes supplied with a
self-adhesive foam gasket mounting-ring for better chassis damping and to
prevent air leakage.

Removable Cloth Cover: The K2 Power 33KX woofer comes with a cloth
cover to protect the magnet from scratches or smudging during transport,
handling, and installation. The cloth cover should be removed once the woofer is
installed. The cloth cover is not designed to be placed on the woofer after it
has been installed.

Enclosure Compatibility

Recommended Sealed Box Volume: The FOCAL K2 Power 33KX is
designed to be installed in a sealed box with a volume between 1.06 cu/ft to
1.77 cu/ft. FOCAL recommends a sealed enclosure made out of 3/4" MDF with an
internal volume of 1.41 cu/ft.

Sealed Enclosure Specifications (using 3/4" MDF
construction)

Internal Volume

1.06 c/ft.

1.41 cu/ft.

1.77 cu/ft.

Dimensions

Width: 14.9375"
Height: 14.5625"
Depth1: 14.5625"
Depth2: 9.3125"

Width: 19.25"
Height: 14.5625
Depth1: 14.5625"
Depth2: 9.3125"

Width: 23.8125"
Height: 14.5625"
Depth1: 14.5625"
Depth2: 9.3125"

Bass Type

fast and tight bass

Punch and dynamic bass

Deep and articulate bass

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Great SQ

Written By Nathan.F, LA on Thursday, January 06, 2011

I got this sub about 2 years ago for my Holden VZ.

This sub sounds amazing, a nice rumble when tuned right.
I paired this with the Focal FP1.800 amp and have NEVER had any problems with either, just great bass, might get a second one too later...